Question

Q17.When a.c. passes through pure inductor then *
(a) e.m.f. leads the current by π/2
(b) e.m.f. lags the current by π/2
(c) e.m.f. leads the current by π/4
(d) e.m.f.and current are in the same phase​

Answer 1

Answer:

a)

Explanation:

e.m. f leads the current by ....

Answer 2

When a.c. passes through pure inductor then  e.m.f. leads the current by π/2

Explanation:

inductive circuits

Positive phase for inductive circuits

current lags the voltage in pure inductive circuit by  π/2  

Hence Voltage lead the current  by  π/2  

EMF lead the current  by  π/2    in pure inductive circuit

Capacitive circuits

Negative phase for Capacitive circuits

current leads the voltage in pure Capacitive circuit by  π/2  

Hence Voltage lags the current  by  π/2  

EMF lags the current  by  π/2    in pure Capacitive circuit

Resistive circuits

Voltage ( EMF) & current are in same phase for pure resistive circuit

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